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Finding the Fourth Proportional to 326,998.29, 490,621.97 and 113,789.89

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Solution

The fourth proportional to 326,998.29, 490,621.97 and 113,789.89 is: 170,728.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,998.29 : 490,621.97 = 113,789.89 : x
  2. Step 2: Convert to fraction form
    326,998.29/490,621.97 = 113,789.89/x
  3. Step 3: Cross multiply
    326,998.29x = 490,621.97 × 113,789.89
  4. Step 4: Simplify right side
    326,998.29x = 55,827,819,997.88
  5. Step 5: Solve for x
    x = 55,827,819,997.88/326,998.29
  6. Step 6: Final answer
    x = 170,728.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.